The first generation of G3 machines were limited to a load size of 130 lbs if it was a 76039 model. This was due to the configuration of the transfer scoop internal to the basket that transfered the goods from one module to the next. This scoop was changed and the G3 machine was now classified as a G3+, which transfered 150 lbs. If it was a 76028 model, the load size would go from 90 lbs to 110 lbs.

On the machine model label plate, there are several pieces of information including the machine model, serial number, date code and model code. If the date code is 02502 and later on a 76039 model or 03025 and later on a 76028 model, you have a G3+ machine. If you look at the model code on a 76039 model, if it says AAH or later for the first module segment or AAE or later for middle or later module segments, you have a G3+ machine. If you look at the model code on a 76028 model, if it says AAD or later on the first module segment, you have a G3+ machine.

Load size is always based on clean dry weight, 100% cotton. If the goods are saturated with water, that weight of the water needs to be factored into the load size determination. The same is true for soil content. Heavily soiled items need the load size compensated by the soil factor taking into account how much soil will be removed from the batch. When the batch is finished washing and completely dry, you should be left with the rated load size for the machine. The last determination to consider for load size is the fabric makeup. There are two principle fabric types washed in a commercial machine (polyester and cotton). The rated load size is always based on cotton. Polyester has different characteristics than cotton. One of those characteristics is the density of the fabric. Polyester is a less dense fabric than cotton. This means it takes up more space or volume for the same poundage as cotton. For this reason, you would underload polyester fabric by about 10% compared to the same batch of linen if it were cotton.

For a more detailed writeup on determining proper load sizes, the book Textile Laundering Technology published through TRSA has some guidance in Chapter 3 in the section Guidlines for Loading.